PULLEY FOR synchronous belt drives WITH TIMING BELT AND THE RELATIVE TRANSMISSION

摘要

A pulley for a synchronous drive system comprising a toothed-belt of polymeric material, the pulley comprising grooves provided with flanks having a parabolic arc-shaped profile and a bottom whose ends coincide with the vertices of said parabolic arc-shaped profile. The length of the bottom is comparable with that of the parabolic arc-shaped profiles. Preferably, the grooves have a shape determined by a hob whose rolling pitch line is tangent to the outer circumference of the pulley.